水下悬浮管道地震响应分析

Earthquake Response Analysis of Submerged Floating Pipe Structures

水下悬浮管道的动力性能,与陆地结构有较大的区别.应用流固耦合数值分析方法和ANSYS软件,建立了地震作用下水中悬浮管道分析模型,采用El Centro地震波,对地震加速度峰值分别为0.5,1,2,4m/s2 4种情况下的响应进行了计算,并通过与无水情况下的计算结果进行比较,分析了地震强度等因素对结构动力响应的影响,探讨了地震作用下水下悬浮管道地震响应规律.结果发现,在有水和无水2种情况下,结构地震响应的峰值在不同时刻发生.在大部分时间内,考虑水作用时的地震响应均大于不考虑水作用时的地震响应,且这种差别随着地震强度的增加而增大.

On dynamic performance,there is a large difference between the land structure and the sub merged floating pipe structures in water. Using numerical analysis of fluidsolid coupling method and the software of ANSYS, the paper established an analysis model of submerged floating pipe under earthquake in water. Using E1 Centro seismic wave, when the four seismic peak acceleration are 0.5 m/s2 , 1 m/s2 , 2 m/s2 , 4 m/s2 ,their response was calculated respectively and by compared with the calculation results of waterless condition, the paper analysised the effect of seismic intensity and other factors on structural dynamic response and discussed the rule of earthquake seismic response of float ing pipe structures in water. The results revealed that the peak of seismic response occurred at differ ent moments in the condition of includeingwater and waterless. Generally, the seismic response con sidering water acting is greater than the one which is not considering water acting, and the difference will increase with the seismic intensity increasing.